Author: Paul S. Weiland

Oncorhynchus mykiss is perhaps the most popular freshwater sport fish in the United States. The geographic distribution of native Oncorhynchus mykiss within the lower 48 states is limited to a handful of states along and adjacent to the west coast — California, Oregon, Washington, and Idaho, although it extends south to Baja California and north to British Columbia and Alaska.  It is artificially propagated by federal and state fish and game agencies and in private aquaculture for game fishing purposes in hundreds of hatcheries and is now established in all of the 48 lower states, at least 45 countries, and every continent except Antarctica. Fly-fishing enthusiasts who live east of the Rockies might be surprised to […]
Choosing among alternative management actions to protect endangered species can be a fraught exercise in light of uncertainty about the outcomes. As Stefano Canessa and his colleagues point out in their article Risk aversion and uncertainty create a conundrum for planning recovery of a critically endangered species recently published in Conservation Science and Practice, the prospect is even more daunting when one or more of the alternatives has the potential to worsen the status of the species. That said, science has the potential to provide decision-makers with valuable information in such circumstances, thereby reducing uncertainty.   Canessa and his colleagues assess nest protection options for critically endangered regent honeyeaters, native […]
In recent years, the Department of Fish and Wildlife (Department) has taken steps to strengthen its science capacity in response to the enactment of AB 2402 by the Legislature and Governor in 2012. Among other things, AB 2402 required the Department and the Fish and Game Commission (Commission) to develop a strategic plan and authorized the Department to establish a Science Institute to inform the work of the Department and the Commission. To strengthen its science capacity, the Department developed a Scientific Integrity Policy in 2017. That Policy states “work that has a substantial scientific or management impact or large expenditure of funds or is especially controversial in nature should […]
After suing the federal government, in Spring 2020 the State of California sought an emergency injunction in federal district court requiring the U.S. Bureau of Reclamation to curtail water exports to central and southern California to protect steelhead migrating down the San Joaquin River and through the Sacramento-San Joaquin Delta on their way to the Pacific Ocean. The State argued that, if the Bureau failed to impose the San Joaquin River inflow to export ratio (referred to as the I:E ratio) in May 2020, it would undermine the overall prospects for recovery of the steelhead.
 In litigation in the same federal court less than a decade ago, the State argued […]
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